Made in India
RASNB
Rockwell cum Brinell Hardness Testing Machine (dial)
RASNB
Dial-type Rockwell tester extended with 187.5 and 250 kgf loads for Brinell testing with 2.5 mm ball; the Brinell impression is measured with the supplied microscope. Same robust powder-coated frame, auto-zero dial and hardened-bush elevating screw as the RASN.
The RASNB is a Rockwell cum Brinell dial hardness tester manufactured by Eklavya Techno Solutions in Ichalkaranji, India for shops that test both hardened parts and softer castings or forgings on one bench. It keeps everything that makes the RASN dependable, including the powder-coated body, the automatic zero-setting dial, the hardened and ground elevating-screw bush and the dash-pot controlled load cycle, and extends the load range to 60, 100, 150, 187.5 and 250 kgf. The three lower loads serve the regular Rockwell scales A to K; the two higher loads are used with the supplied 2.5 mm ball for Brinell scales HBW 2.5/187.5 and HBW 2.5/250.
Brinell testing on this machine works differently from Rockwell. Instead of reading depth on the dial, the operator selects the Brinell load by hand, makes the indentation, and measures the diameter of the impression with the supplied Brinell microscope before reading the hardness value from the standard tables. The machine offers 230 mm test height and 133 mm throat depth, weighs about 75 kg, and is supplied with flat and V-groove tables, three indenters and Rockwell C, Rockwell B and HBW 2.5/187.5 test blocks.
Major load (total test force): 588.4, 980.7, 1471, 1839, 2452 N (60, 100, 150, 187.5, 250 kgf)
IS 1586 (Part 2) – Rockwell hardness test – verification and calibration of testing machines
ASTM E18 – Standard test methods for Rockwell hardness of metallic materials
ISO 6508-2 – Metallic materials – Rockwell hardness test – verification and calibration of testing machines and indenters
IS 1500 (Part 2) – Brinell hardness test – verification and calibration of testing machines
RASN series (dial): models compared side by side, current model highlighted.
| Parameter | RASN | RASNB | RASN-Twin |
|---|---|---|---|
| Type | Rockwell, dial readout, manual cycle | Rockwell cum Brinell, dial readout, manual cycle | Rockwell cum Superficial, dial readout, manual cycle |
| Major load (total test force) | 588.4, 980.7, 1471 N (60, 100, 150 kgf) | 588.4, 980.7, 1471, 1839, 2452 N (60, 100, 150, 187.5, 250 kgf) | 147.1, 294.2, 441.3, 588.4, 980.7, 1471 N (15, 30, 45, 60, 100, 150 kgf) |
| Minor load (preliminary force) | 98.07 N (10 kgf) | 98.07 N (10 kgf) | 29.42, 98.07 N (3, 10 kgf) |
| Scales | HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK | Rockwell A to K; Brinell HBW 2.5/187.5, 2.5/250 | Rockwell A to K; Superficial 15N, 30N, 45N, 15T, 30T, 45T |
| Resolution | 1 Rockwell | 1 Rockwell | 1 Rockwell |
| Max. test height | 230 mm | 230 mm | 230 mm |
| Depth of throat | 133 mm | 133 mm | 133 mm |
| Net weight (approx.) | 70 kg | 75 kg | 75 kg |
| Machine dimensions (L × W × H) | L-500 × W-170 × H-640 mm | L-500 × W-170 × H-640 mm | L-500 × W-170 × H-640 mm |
| Standard tables | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs |
| Indenters supplied | Diamond indenter Rockwell RA; 1/16" ball indenter | Diamond indenter Rockwell RA; 1/16" ball; 2.5 mm ball | Diamond indenters Rockwell RA and Rockwell SF; 1/16" ball |
| Test blocks supplied | Rockwell C and Rockwell B test blocks | Rockwell C, Rockwell B and HBW 2.5/187.5 test blocks | Rockwell C, Rockwell B and HR 30 N test blocks |
| Optional | 5 mm step inserts; jack rest for long and heavy jobs | 5 mm step inserts; jack rest for long and heavy jobs | 5 mm step inserts; jack rest for long and heavy jobs |
| Brinell testing | — | Brinell 187.5 / 250 kgf selected manually with the matching ball indenter; impression diameter measured with the supplied Brinell microscope (no Brinell scale on the display) | — |
The RASNB applies 187.5 or 250 kgf through a 2.5 mm ball indenter to make a Brinell impression. There is no Brinell scale on the dial, so the operator measures the impression diameter with the supplied Brinell microscope and reads the HBW value from the standard tables. The Rockwell scales are read directly on the dial as on the RASN.
HBW 2.5/187.5 has the same force-to-ball-diameter ratio as the classic HBW 10/3000 steel test, so it gives comparable Brinell numbers on steels and cast irons using a smaller impression. This makes the RASNB useful for grey iron castings, forgings, normalised or annealed steel and thicker non-ferrous sections that are too soft or too coarse-grained for a Rockwell diamond.
Both are dial-reading, hand-operated testers with the same frame, tables and 230 mm test height. The RASN stops at 150 kgf and tests Rockwell scales only. The RASNB adds the 187.5 and 250 kgf loads, a 2.5 mm ball indenter, a Brinell microscope and an HBW 2.5/187.5 test block, and weighs about 5 kg more. Complies additionally with IS 1500 (Part 2) for Brinell.
The Rockwell function is built to IS 1586 (Part 2), ASTM E18 and ISO 6508-2, and the Brinell function to IS 1500 (Part 2). Certified Rockwell C, Rockwell B and HBW 2.5/187.5 test blocks are supplied so that both methods can be verified at installation and checked routinely on the shop floor.
Yes. The RASN-250-D offers the same Rockwell cum Brinell load range with a digital 0.1 Rockwell readout, USB CSV export and thermal printer; the RSNE-250 adds a motorised load, dwell and unload cycle; and the RSNE-250-T and RASNB-TSFA are the touch-screen versions. All of them still measure the Brinell impression with a microscope.
